public void WhenJoinersAndLeaversAlternate_ThenHighWatermarkIsOne()
{
var baseDate = new DateTime(2020, 1, 1);
var joiners = new[]
{
baseDate,
baseDate.AddHours(2)
};
var leavers = new[]
{
baseDate.AddHours(1),
baseDate.AddHours(3)
};
Assert.AreEqual(1, TimeseriesUtil.HighWatermark(joiners, leavers));
}
public void WhenJoinersAndLeaversOverlap_ThenHighWatermarkIsOverOne()
{
var baseDate = new DateTime(2020, 1, 1);
var joiners = new[]
{
baseDate,
baseDate.AddHours(1),
baseDate.AddHours(2),
baseDate.AddHours(6)
};
var leavers = new[]
{
baseDate.AddHours(3),
baseDate.AddHours(4),
baseDate.AddHours(5),
baseDate.AddHours(7)
};
Assert.AreEqual(3, TimeseriesUtil.HighWatermark(joiners, leavers));
}
public void WhenJoinerOnFirstDay_ThenDailyHistoramIsOneAtFirstDay()
{
var baseDate = new DateTime(2020, 1, 1);
var joiners = new[]
{
baseDate
};
var leavers = new[]
{
baseDate.AddDays(4).AddMinutes(30)
};
var histogram = TimeseriesUtil.DailyHistogram(joiners, leavers).ToList();
Assert.AreEqual(1, histogram[0].Value);
Assert.AreEqual(1, histogram[1].Value);
Assert.AreEqual(1, histogram[2].Value);
Assert.AreEqual(1, histogram[3].Value);
Assert.AreEqual(1, histogram[4].Value);
}
public void WhenJoinersAndLeaversOverlap_ThenDailyHistogramUsesTotal()
{
var baseDate = new DateTime(2020, 1, 1);
var joiners = new[]
{
baseDate.AddDays(1),
baseDate.AddDays(2).AddHours(1),
baseDate.AddDays(3),
baseDate.AddDays(7).AddSeconds(1)
};
var leavers = new[]
{
baseDate.AddDays(4).AddMinutes(30),
baseDate.AddDays(5),
baseDate.AddDays(6),
baseDate.AddDays(10)
};
var histogram = TimeseriesUtil.DailyHistogram(joiners, leavers).ToList();
Assert.AreEqual(1, histogram[0].Value);
Assert.AreEqual(2, histogram[1].Value);
Assert.AreEqual(3, histogram[2].Value);
Assert.AreEqual(3, histogram[3].Value);
Assert.AreEqual(2, histogram[4].Value);
Assert.AreEqual(1, histogram[5].Value);
Assert.AreEqual(1, histogram[6].Value);
Assert.AreEqual(1, histogram[7].Value);
Assert.AreEqual(1, histogram[8].Value);
Assert.AreEqual(1, histogram[9].Value);
Assert.AreEqual(baseDate.AddDays(1), histogram[0].Timestamp);
Assert.AreEqual(baseDate.AddDays(10), histogram[9].Timestamp);
}
public void WhenBalanceChagesThroughoutDay_ThenDailyHistoramReportsMaxButRepeatsLast()
{
var baseDate = new DateTime(2020, 1, 1);
var joiners = new[]
{
baseDate.AddMinutes(1),
baseDate.AddMinutes(2),
baseDate.AddMinutes(3),
};
var leavers = new[]
{
baseDate.AddMinutes(4),
baseDate.AddMinutes(5),
baseDate.AddDays(2)
};
var histogram = TimeseriesUtil.DailyHistogram(joiners, leavers).ToList();
Assert.AreEqual(3, histogram[0].Value);
Assert.AreEqual(1, histogram[1].Value);
Assert.AreEqual(1, histogram[2].Value);
}
